Serebii.net has just updated with this:
It is very unlikely that Pokémon Sunday will reveal any new details tonight. Since Heart Gold & Soul Silver has been announced, the Chatroom & WiFi Chatroom have been booming with discussion & trade respectively so be sure to visit them.
In The Games Department
Pokémon Heart Gold & Soul Silver - Johto Dex Details
Some new Johto Dex numbers for Growlithe and Lapras have been revealed via the PokéFesta demo in Japan. These numbers disprove the theory that the Johto Dex Order completely matches the order from the original Gold & Silver games as they are both of a higher number than they were in those games. These Pokémon and their numbers have been added to the page. Click the picture to go to the page.
In The Anime Department
Dub Episode Title
Once again, the Cartoon Network TV schedule revealed a new dub episode title. This is the episode title for the fifteenth episode of this season and the 587th episode total. It is also the final main episode to be produced in Standard Definition. This episode features Dawn having to look after Mamoswine after it has been injured in a battle against a wild Aggron. This episode is to be called Trials and Adulations! and is scheduled to air on the 15th of August. Click the picture for synopsis and episode pictures;
-- Delivered by Feed43 service